Sterilizer.



A. E. WALDEN.

I STERILIZER. APPLICATION FILED JUNE 20. 1912.

Patented Oct. 28, 1913.

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ALBERT E. WALDEN, 0F BALTIMORE, MARYLANDJ STERILIZEB.

Specification of Letters latent.

Patented Oct. as, 1913.

A iplication file'd June 20, 1912. serial no. 704,7os.

To all whom it may concern:

Be it known that I, ALBERTE. WALDEN, a

citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and usefullmprove ments in Sterilizers, of which the following is a specification. This invention relates to improvements insterilizers, and has for its object to provide a device for sterilizing water, sewage or other fluids, by means of ozone, air or other suitable'gas, at atmospheric pressure The practical problem of water, sewage or other liquid sterilization, by means of any suitable gas, involves .certain requirements, such as aspirators, mixing or suction devices, primarily designed to handle certain volumes of gas, and to sterilize both by washing with the gas and by the liquid absorbing the gas, and the mixing devices and systems heretofore employed for this purpose have not been capable of fulfilling these requirements. Such a solution primarily demands that the aspirator and mixer shall ozone, or other gas, for a given volume and head of water or liquid, imparting such a velocity to the water as will overcome the known tendency of an air or gas bubble to rise at some points and allow it to rise at others, and that the curve of such an aspirator shall be practically a straight line, and this straight line operation has not been fully met in injector aspirators, or injectors or ejectors of any type employed heretofore, but will vary in either direction with a varying head.

It is the purpose of my present invention to construct a cheaper and more simple apparatus and one that is easy to manage and that can be operated, preferably, under low heads.

The invention consists of the novel construction and arrangement of the parts and combination of parts hereinafter more fully set forth in the following specification and pointed out in detail in the claims.

In the accompanying drawings,Figure l is a vertical sectional view of my invention. Fig. 2 is a modification of the connection between the mixing wells. Fig. 3 is a modification of the mixing and washing well. Fig. 4 is a further modification of the mixing and washing well.

Referring to the accompanying drawings, forming part of this specification, and in which like reference numerals designate like partsthroughout the several views thereof, 1 designates a pipe through which the water, sewage, or other liquid to be sterilized, is pumped or forced to the tank 2, from which point it flows by gravity through the pipe 2? to the nozzle 3 and into the chamber 5 of the aspirat'or where the mixing begins, the ozone, or other gas, being drawn or sucked through the pipe 4 by the action of the water passing through the aspirator.

The'walls of the aspirator 6 below the chamber 5 converge'and then diverge and terminate in a straight lower end projecting into the mixing and washing well 7. The water passing from the chamber. 5 is given the necessary velocity to overcome the lmown tendency of an air orgas bubble to rise in said aspirator, and is further mixed with the ozone, or other gas, as it passes through the aspirator 6 to thesaid well 7, in which latter a certain reduction of velocity and breaking up of the mixture takes place, a portionjof the ozone, or other gas, rising more rapidly to the top of said well 7, thereby washing the liquid with the ozone,.or other gas, as it passes through the water and accumulates in the top of the well7, said gas being under a certain pressure which tends to assist in the discharge of the mixed ozone, or other gas, and water, sewage, or other liquid, through the submixing pipe 8, which latter connects the well 7 with the secondary well 9. This well 9 is provided with one or more outlets leading to the weirs 12" and 13 and a pipe 10 leading from near the top of the well 9 to the weir '12.

As the water, or other liquid, flows through the pipe 8 to the well 9 the residue or excess ozone, or other gas, accumulates in the top of said well 9 and is forced by its own pressure through the pipe 10 to the water in the weir 12 and passes OK to the atmosphere as the water flows from said weir 12 to the clear well, and any ozone, or other gas,

7 The suction created by the action of the water passing through the neck 8 oi the.

pipe 8 combined with the pressure in the well 7 again causes the ozone, or other gas, to more thoroughly mix with the water passing to the well 9.

In Fig. 3 I have showna modification of the mixing well. In this modification the water, sewage or other liquid passes from the tank 15 to the aspirator 16 where it mixes with the ozone, or other gas, from the generator 17 and then passes down the pipe 18 to the bottom of the mixing well 18 and then flows up through the checker work 19, preferably of some material that is not porous, where it is thoroughly broken up and the velocity of the water reduced, allowing the air or gas bubbles to rise more 'apidly than the water, the idea being to thoroughly wash as much of the water with the ozone, or other gas, as possible. The water flows from the well 18 through the aperture 19 to the chamber 20 and through the aperture 20 to the chamber 21. From the chamber 20 the water flows through the submixing pipe 22 to the well 23, the ozone, or other gas, in the top of the chambers 20 and 21 flows through the pipe 241 and mixes with the ozone, or other gas, arising in the well 23 and is forced down through the pipe 25 breaking the seal at 26 and the excess ozone, or other ga's, then remaining passes oil to the atmosphere or clear well, or both, through the water flowing over the weirs, as heretofore described.

In Fig. 4 I have shown a further modification of the mixing and washing well. This modification is similar to that shown in Fig. 5, but instead of the water, sewage, or other liquid passing into the well, it passes into the enlarged pipe 27 where the Velocity of said water, or other liquid, is reduced allowing the bubbles of air or gas to rise and expand, washing the liquid with the ozone, or other gas, the water or liquid together with the ozone, or other gas, that is not given up, passing through the submixing pipe 22 to the well 23, the ozone, or other which accumulates in the top of the large pipe 27 passes through the pipe 2% to the top of the well 23 where it is mixed with the ozone, or other gas, which is liberated in said well 23, and passes ofi' through the pipe 25 breaking the seal at 26 and passing off to the clear well or to the atmosphere, or both, through the water flowing over the weirs.

Having thus described my invention, what I claim is:

1. In a sterilizer, the combination of an aspirator, a mixing well into which the lower end of the 'aspirator projects, a secondary mixing well provided with weirs on the outside thereof, a pipe projecting from near the top of the secondary mixing well down into one of said weirs on the outside of said secondary mixing well, and a pipe connecting said mixing wells.

2. In a sterilizer, the combination of an aspirator, a mixing well in which the lower end of the aspirator projects, a secondary mixing well provided with weirs on the out side thereof, a pipe connecting said mixing wells and having a contracted neck, and a pipe projecting from near the top of the first mixing well into the contracted neck of the pipe which connects the mixing wells.

3. in 'a sterilizer, the combination of an aspirator, a mixing well into which the aspi rator'projects, a secondary mixing wellprovided with weirs, a pipe projecting from near the top of the said secondary mixing well down into one of said weirs, the side walls of which latter project high enough to form a seal by the overflow from the weir above, and a pipe connecting said mixing wells,

l. in sterilizer, the combination of an aspirator, a supply tank having communication with said aspirator, a mixing well into which the aspirator projects, a secondary mixing well provided with weirs, a pipe projecting from near the top of the said secondary mixing well down into one of said weirs, the side walls of which latter project upwardly high enough to form a seal by the overflow from the weir above, and a pipe connecting said mixing wells.

5. In a sterilizer, the combination of an aspirator, mixing well into which the lower end of the asp'irator pro ects, a secondary mixing well provided with weirs on the outside thereof, a pipe leading from near the top of the secoi'idary mixing well down into one of said weirs on the outside oi said secondary mixing well, pipe coir ne'cting said mixing wells and having a contracted neck, and a pipe projecting from near the top of the first mixing well into the contracted neck of the Pipe which connects the mixing wells.

5. In a sterilizer, the combination of an aspirator, a supply tank having con'imunication with the aspirator, a mixing well into which the aspirator projects, a secondary mixin well provided with weirs on the outside thereof, a pipe connecting said mixing wells, and a pipe projecting from near the top of thesecondary mixing well down into one or" said weirs on the outside of said secondary mixing well.

In testimony whereof I aflix my signature in presence of two witnesses.

ALBERT E. VALDEN.

lVitn'e'sses Rosa. 0. Rnonns, CHAPIN A. FERGUSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

